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Date: Thu, 29 Nov 2018 17:21:08 +0800
From: kernel test robot <rong.a.chen@...el.com>
To: Josef Bacik <jbacik@...com>
Cc: David Sterba <dsterba@...e.com>,
LKML <linux-kernel@...r.kernel.org>,
Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org
Subject: [LKP] [btrfs] 4fd93529bc: fio.write_bw_MBps -6.9% regression
Greeting,
FYI, we noticed a -6.9% regression of fio.write_bw_MBps due to commit:
commit: 4fd93529bcf2686433120ac18662513548d937d3 ("btrfs: introduce delayed_refs_rsv")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
in testcase: fio-basic
on test machine: 72 threads Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 128G memory
with following parameters:
disk: 1SSD
fs: btrfs
runtime: 300s
nr_task: 8
rw: randwrite
bs: 4k
ioengine: sync
test_size: 512g
ucode: 0x3d
cpufreq_governor: performance
test-description: Fio is a tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user.
test-url: https://github.com/axboe/fio
Details are as below:
-------------------------------------------------------------------------------------------------->
To reproduce:
git clone https://github.com/intel/lkp-tests.git
cd lkp-tests
bin/lkp install job.yaml # job file is attached in this email
bin/lkp run job.yaml
=========================================================================================
bs/compiler/cpufreq_governor/disk/fs/ioengine/kconfig/nr_task/rootfs/runtime/rw/tbox_group/test_size/testcase/ucode:
4k/gcc-7/performance/1SSD/btrfs/sync/x86_64-rhel-7.2/8/debian-x86_64-2018-04-03.cgz/300s/randwrite/lkp-hsw-ep2/512g/fio-basic/0x3d
commit:
c3b63109d1 ("btrfs: only track ref_heads in delayed_ref_updates")
4fd93529bc ("btrfs: introduce delayed_refs_rsv")
c3b63109d175d206 4fd93529bcf2686433120ac186
---------------- --------------------------
fail:runs %reproduction fail:runs
| | |
2:4 -50% :4 dmesg.WARNING:at#for_ip_interrupt_entry/0x
%stddev %change %stddev
\ | \
0.19 ± 10% +0.8 0.95 ± 3% fio.latency_1000us%
1.76 ± 8% +21.6 23.40 ± 5% fio.latency_100us%
0.02 ± 3% +0.1 0.09 ± 10% fio.latency_10ms%
5.24 ± 8% -1.6 3.66 ± 11% fio.latency_10us%
0.01 +0.0 0.02 ± 11% fio.latency_20ms%
1.55 ± 3% -0.7 0.86 ± 27% fio.latency_20us%
75.43 -52.2 23.19 ± 2% fio.latency_250us%
0.49 ± 4% +0.5 0.94 ± 9% fio.latency_2ms%
0.02 ± 17% +0.2 0.26 ± 11% fio.latency_4ms%
14.71 ± 7% -3.4 11.33 ± 5% fio.latency_500us%
0.20 ± 9% +32.1 32.33 fio.latency_50us%
0.21 ± 13% +2.6 2.80 ± 4% fio.latency_750us%
325.40 -1.8% 319.61 fio.time.elapsed_time
325.40 -1.8% 319.61 fio.time.elapsed_time.max
71398082 -6.6% 66663998 fio.time.file_system_outputs
24.71 ± 2% -10.6% 22.10 fio.time.user_time
8326551 -4.2% 7980852 fio.time.voluntary_context_switches
8922305 -6.6% 8331632 fio.workload
116.17 -6.9% 108.10 fio.write_bw_MBps
274.00 +28.5% 352.00 fio.write_clat_90%_us
316.00 +59.8% 505.00 fio.write_clat_95%_us
467.00 ± 3% +151.0% 1172 ± 4% fio.write_clat_99%_us
267.51 +7.6% 287.72 fio.write_clat_mean_us
29740 -6.9% 27673 fio.write_iops
9896739 ± 11% +34.2% 13283798 ± 6% cpuidle.POLL.time
3005327 ± 12% +36.3% 4097378 ± 4% cpuidle.POLL.usage
9059 ± 21% -20.1% 7235 ± 2% softirqs.NET_RX
5980740 ± 4% -17.0% 4961204 ± 6% softirqs.RCU
198.25 ± 2% +10.6% 219.25 ± 2% turbostat.Avg_MHz
11.89 ± 10% -30.7% 8.24 ± 24% turbostat.Pkg%pc2
0.36 ± 2% +0.4 0.77 ± 4% mpstat.cpu.iowait%
4.26 +0.7 4.98 ± 2% mpstat.cpu.sys%
0.13 ± 2% -0.0 0.11 ± 9% mpstat.cpu.usr%
573529 ± 10% -39.8% 345193 ± 12% numa-meminfo.node0.Dirty
21728 ± 7% +49.3% 32433 ± 10% numa-meminfo.node0.Writeback
8778 ± 15% +77.0% 15540 ± 13% numa-meminfo.node1.Writeback
143494 ± 10% -40.1% 85936 ± 12% numa-vmstat.node0.nr_dirty
5496 ± 5% +53.1% 8414 ± 6% numa-vmstat.node0.nr_writeback
149300 ± 9% -36.6% 94629 ± 11% numa-vmstat.node0.nr_zone_write_pending
2184 ± 21% +71.9% 3754 ± 14% numa-vmstat.node1.nr_writeback
218022 +10.2% 240277 vmstat.io.bo
26855227 -8.6% 24557716 vmstat.memory.cache
396691 +9.3% 433456 vmstat.system.cs
180728 -1.7% 177599 vmstat.system.in
54.15 ± 2% +69.9% 91.99 ± 4% iostat.sdb.avgqu-sz
202.81 ± 9% -32.3% 137.37 ± 10% iostat.sdb.avgrq-sz
27069 -4.0% 25994 iostat.sdb.w/s
217862 +10.3% 240272 iostat.sdb.wkB/s
1.37 ± 20% +261.6% 4.96 ± 5% iostat.sdb.wrqm/s
5028110 ± 6% -25.2% 3762248 ± 5% meminfo.Active
4751087 ± 6% -26.7% 3483276 ± 6% meminfo.Active(file)
25867858 -8.8% 23583792 meminfo.Cached
887304 ± 2% -31.5% 607410 meminfo.Dirty
30842 ± 8% +54.3% 47603 ± 4% meminfo.Writeback
5.038e+11 ± 5% +14.4% 5.762e+11 ± 5% perf-stat.branch-instructions
1.312e+08 +6.5% 1.398e+08 perf-stat.context-switches
4.936e+12 ± 3% +9.3% 5.395e+12 ± 6% perf-stat.cpu-cycles
0.55 ± 12% -0.1 0.40 ± 8% perf-stat.dTLB-load-miss-rate%
3.947e+09 ± 12% -16.4% 3.302e+09 ± 9% perf-stat.dTLB-load-misses
7.115e+11 ± 6% +14.4% 8.141e+11 ± 5% perf-stat.dTLB-loads
2.637e+12 ± 6% +14.1% 3.009e+12 ± 5% perf-stat.instructions
903201 -2.9% 877236 perf-stat.minor-faults
903221 -2.9% 877223 perf-stat.page-faults
295526 ± 6% +22.2% 361161 ± 5% perf-stat.path-length
233.51 ± 28% +263.3% 848.24 ± 26% sched_debug.cfs_rq:/.exec_clock.min
7673 ± 14% -21.6% 6016 ± 14% sched_debug.cfs_rq:/.exec_clock.stddev
195.54 ± 10% +14.8% 224.58 ± 5% sched_debug.cfs_rq:/.load_avg.stddev
2.73 ± 28% +52.7% 4.18 ± 27% sched_debug.cfs_rq:/.removed.util_avg.avg
13.44 ± 14% +70.9% 22.96 ± 34% sched_debug.cfs_rq:/.removed.util_avg.stddev
41.17 ± 24% +37.7% 56.70 ± 9% sched_debug.cfs_rq:/.runnable_load_avg.avg
138.20 ± 12% +16.3% 160.67 ± 3% sched_debug.cfs_rq:/.runnable_load_avg.stddev
91.34 ± 10% +15.2% 105.27 ± 10% sched_debug.cpu.cpu_load[2].stddev
79.46 ± 10% +18.8% 94.42 ± 11% sched_debug.cpu.cpu_load[3].stddev
814.50 +11.6% 908.82 ± 7% sched_debug.cpu.curr->pid.stddev
12393 ± 56% +458.8% 69261 ± 13% sched_debug.cpu.nr_switches.min
880934 ± 11% -23.2% 676786 ± 14% sched_debug.cpu.nr_switches.stddev
12090 ± 57% +467.5% 68614 ± 13% sched_debug.cpu.sched_count.min
881104 ± 11% -23.1% 677137 ± 14% sched_debug.cpu.sched_count.stddev
6021 ± 57% +469.2% 34275 ± 13% sched_debug.cpu.sched_goidle.min
440105 ± 11% -23.2% 338119 ± 14% sched_debug.cpu.sched_goidle.stddev
1512 ± 64% +688.4% 11921 ± 42% sched_debug.cpu.ttwu_count.min
3574 ± 24% +46.1% 5220 ± 18% sched_debug.cpu.ttwu_local.avg
138459 ± 47% +70.4% 235958 ± 28% sched_debug.cpu.ttwu_local.max
16146 ± 47% +70.3% 27493 ± 28% sched_debug.cpu.ttwu_local.stddev
1187638 ± 6% -26.7% 870813 ± 6% proc-vmstat.nr_active_file
18056001 +7.5% 19407987 proc-vmstat.nr_dirtied
222170 ± 2% -31.7% 151680 proc-vmstat.nr_dirty
6469411 -8.8% 5898305 proc-vmstat.nr_file_pages
25594617 +2.3% 26176799 proc-vmstat.nr_free_pages
55526 +2.8% 57092 proc-vmstat.nr_inactive_anon
4989952 -5.1% 4734307 proc-vmstat.nr_inactive_file
59395 +2.7% 60992 proc-vmstat.nr_mapped
57213 +2.6% 58672 proc-vmstat.nr_shmem
480860 -2.6% 468192 proc-vmstat.nr_slab_unreclaimable
7572 ± 7% +59.8% 12102 ± 4% proc-vmstat.nr_writeback
18027209 +7.5% 19370852 proc-vmstat.nr_written
1187638 ± 6% -26.7% 870813 ± 6% proc-vmstat.nr_zone_active_file
55526 +2.8% 57092 proc-vmstat.nr_zone_inactive_anon
4989952 -5.1% 4734307 proc-vmstat.nr_zone_inactive_file
230210 ± 2% -28.7% 164220 proc-vmstat.nr_zone_write_pending
13092479 -7.9% 12051991 proc-vmstat.numa_hit
13078305 -7.9% 12038637 proc-vmstat.numa_local
1203496 ± 7% -50.0% 601160 ± 12% proc-vmstat.pgactivate
16801820 ± 2% +5.8% 17780491 proc-vmstat.pgalloc_normal
923922 -2.9% 897337 proc-vmstat.pgfault
72108783 +7.5% 77484272 proc-vmstat.pgpgout
29951 ± 9% -36.6% 18992 ± 2% slabinfo.Acpi-ParseExt.active_objs
784.50 ± 9% -34.2% 516.25 ± 2% slabinfo.Acpi-ParseExt.active_slabs
30612 ± 9% -34.2% 20148 ± 2% slabinfo.Acpi-ParseExt.num_objs
784.50 ± 9% -34.2% 516.25 ± 2% slabinfo.Acpi-ParseExt.num_slabs
47360 ± 5% -41.6% 27645 ± 5% slabinfo.avc_xperms_data.active_objs
372.75 ± 5% -41.1% 219.50 ± 4% slabinfo.avc_xperms_data.active_slabs
47782 ± 5% -41.0% 28171 ± 5% slabinfo.avc_xperms_data.num_objs
372.75 ± 5% -41.1% 219.50 ± 4% slabinfo.avc_xperms_data.num_slabs
625.00 ± 24% +51.6% 947.25 ± 7% slabinfo.biovec-128.active_objs
642.75 ± 22% +47.8% 949.75 ± 7% slabinfo.biovec-128.num_objs
753.75 ± 16% +43.5% 1081 ± 5% slabinfo.biovec-64.active_objs
753.75 ± 16% +43.5% 1081 ± 5% slabinfo.biovec-64.num_objs
2199 ± 24% +126.4% 4977 ± 6% slabinfo.biovec-max.active_objs
555.00 ± 24% +125.6% 1252 ± 5% slabinfo.biovec-max.active_slabs
2222 ± 24% +125.4% 5010 ± 5% slabinfo.biovec-max.num_objs
555.00 ± 24% +125.6% 1252 ± 5% slabinfo.biovec-max.num_slabs
33746 ± 8% -37.0% 21253 slabinfo.btrfs_delayed_ref_head.active_objs
674.50 ± 8% -34.8% 439.75 ± 2% slabinfo.btrfs_delayed_ref_head.active_slabs
34430 ± 8% -34.8% 22460 ± 2% slabinfo.btrfs_delayed_ref_head.num_objs
674.50 ± 8% -34.8% 439.75 ± 2% slabinfo.btrfs_delayed_ref_head.num_slabs
725.75 ± 2% -12.8% 632.50 ± 4% slabinfo.btrfs_inode.active_objs
727.75 ± 2% -13.0% 633.25 ± 4% slabinfo.btrfs_inode.num_objs
19890 ± 2% +64.6% 32735 ± 3% slabinfo.btrfs_ordered_extent.active_objs
513.25 +64.7% 845.25 ± 3% slabinfo.btrfs_ordered_extent.active_slabs
20038 +64.6% 32983 ± 3% slabinfo.btrfs_ordered_extent.num_objs
513.25 +64.7% 845.25 ± 3% slabinfo.btrfs_ordered_extent.num_slabs
8562 -37.4% 5357 slabinfo.kmalloc-192.active_objs
8576 -37.4% 5371 slabinfo.kmalloc-192.num_objs
79749 ± 3% +22.0% 97286 slabinfo.kmalloc-64.active_objs
1253 ± 3% +22.2% 1531 slabinfo.kmalloc-64.active_slabs
80232 ± 3% +22.2% 98070 slabinfo.kmalloc-64.num_objs
1253 ± 3% +22.2% 1531 slabinfo.kmalloc-64.num_slabs
9144 ± 14% +22.4% 11193 ± 7% slabinfo.mnt_cache.active_objs
9317 ± 13% +22.6% 11425 ± 7% slabinfo.mnt_cache.num_objs
905.50 ± 11% +13.9% 1031 ± 4% slabinfo.skbuff_fclone_cache.active_objs
905.50 ± 11% +13.9% 1031 ± 4% slabinfo.skbuff_fclone_cache.num_objs
7.88 ± 29% -4.8 3.06 ± 54% perf-profile.calltrace.cycles-pp.wb_workfn.process_one_work.worker_thread.kthread.ret_from_fork
7.88 ± 29% -4.8 3.06 ± 54% perf-profile.calltrace.cycles-pp.wb_writeback.wb_workfn.process_one_work.worker_thread.kthread
6.90 ± 26% -4.2 2.71 ± 49% perf-profile.calltrace.cycles-pp.do_writepages.__writeback_single_inode.writeback_sb_inodes.wb_writeback.wb_workfn
6.90 ± 26% -4.2 2.71 ± 49% perf-profile.calltrace.cycles-pp.writeback_sb_inodes.wb_writeback.wb_workfn.process_one_work.worker_thread
6.90 ± 26% -4.2 2.71 ± 49% perf-profile.calltrace.cycles-pp.__writeback_single_inode.writeback_sb_inodes.wb_writeback.wb_workfn.process_one_work
5.64 ± 25% -2.9 2.78 ± 60% perf-profile.calltrace.cycles-pp.extent_write_cache_pages.extent_writepages.do_writepages.__writeback_single_inode.writeback_sb_inodes
5.38 ± 25% -2.7 2.66 ± 61% perf-profile.calltrace.cycles-pp.__extent_writepage.extent_write_cache_pages.extent_writepages.do_writepages.__writeback_single_inode
4.49 ± 24% -2.4 2.14 ± 66% perf-profile.calltrace.cycles-pp.writepage_delalloc.__extent_writepage.extent_write_cache_pages.extent_writepages.do_writepages
4.76 ± 18% -2.3 2.43 ± 57% perf-profile.calltrace.cycles-pp.extent_writepages.do_writepages.__writeback_single_inode.writeback_sb_inodes.wb_writeback
4.04 ± 28% -2.0 2.02 ± 67% perf-profile.calltrace.cycles-pp.btrfs_run_delalloc_range.writepage_delalloc.__extent_writepage.extent_write_cache_pages.extent_writepages
4.04 ± 28% -2.0 2.01 ± 67% perf-profile.calltrace.cycles-pp.run_delalloc_nocow.btrfs_run_delalloc_range.writepage_delalloc.__extent_writepage.extent_write_cache_pages
1.67 ± 45% -1.2 0.45 ±100% perf-profile.calltrace.cycles-pp.submit_one_bio.submit_extent_page.write_one_eb.btree_write_cache_pages.do_writepages
1.67 ± 45% -1.2 0.45 ±100% perf-profile.calltrace.cycles-pp.btree_submit_bio_hook.submit_one_bio.submit_extent_page.write_one_eb.btree_write_cache_pages
1.66 ± 45% -1.2 0.44 ±100% perf-profile.calltrace.cycles-pp.btree_csum_one_bio.btree_submit_bio_hook.submit_one_bio.submit_extent_page.write_one_eb
1.65 ± 45% -1.2 0.44 ±100% perf-profile.calltrace.cycles-pp.csum_tree_block.btree_csum_one_bio.btree_submit_bio_hook.submit_one_bio.submit_extent_page
1.64 ± 45% -1.2 0.44 ±100% perf-profile.calltrace.cycles-pp.crc32c.csum_tree_block.btree_csum_one_bio.btree_submit_bio_hook.submit_one_bio
1.63 ± 45% -1.2 0.44 ±100% perf-profile.calltrace.cycles-pp.chksum_update.crc32c.csum_tree_block.btree_csum_one_bio.btree_submit_bio_hook
1.63 ± 45% -1.2 0.44 ±100% perf-profile.calltrace.cycles-pp.__crc32c_le.chksum_update.crc32c.csum_tree_block.btree_csum_one_bio
0.69 ± 16% +0.4 1.07 ± 28% perf-profile.calltrace.cycles-pp.push_leaf_right.split_leaf.setup_leaf_for_split.btrfs_duplicate_item.btrfs_mark_extent_written
0.82 ± 17% +0.4 1.22 ± 27% perf-profile.calltrace.cycles-pp.split_leaf.setup_leaf_for_split.btrfs_duplicate_item.btrfs_mark_extent_written.btrfs_finish_ordered_io
0.72 ± 18% +0.5 1.18 ± 25% perf-profile.calltrace.cycles-pp.setup_items_for_insert.btrfs_insert_empty_items.btrfs_csum_file_blocks.add_pending_csums.btrfs_finish_ordered_io
0.79 ± 19% +0.5 1.26 ± 21% perf-profile.calltrace.cycles-pp.setup_items_for_insert.btrfs_duplicate_item.btrfs_mark_extent_written.btrfs_finish_ordered_io.normal_work_helper
0.46 ± 59% +0.6 1.02 ± 28% perf-profile.calltrace.cycles-pp.btrfs_search_slot.btrfs_insert_empty_items.btrfs_csum_file_blocks.add_pending_csums.btrfs_finish_ordered_io
0.90 ± 26% +0.6 1.47 ± 27% perf-profile.calltrace.cycles-pp.save_stack_trace_tsk.__account_scheduler_latency.enqueue_entity.enqueue_task_fair.ttwu_do_activate
0.59 ± 60% +0.6 1.19 ± 37% perf-profile.calltrace.cycles-pp.enqueue_task_fair.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common
0.61 ± 60% +0.6 1.23 ± 37% perf-profile.calltrace.cycles-pp.ttwu_do_activate.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock
0.95 ± 29% +0.7 1.68 ± 36% perf-profile.calltrace.cycles-pp.__wake_up_common.__wake_up_common_lock.unlock_up.btrfs_search_slot.btrfs_mark_extent_written
0.78 ± 59% +0.8 1.59 ± 36% perf-profile.calltrace.cycles-pp.try_to_wake_up.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.unlock_up
0.81 ± 59% +0.8 1.66 ± 36% perf-profile.calltrace.cycles-pp.autoremove_wake_function.__wake_up_common.__wake_up_common_lock.unlock_up.btrfs_search_slot
1.33 ± 17% +0.9 2.21 ± 26% perf-profile.calltrace.cycles-pp.btrfs_insert_empty_items.btrfs_csum_file_blocks.add_pending_csums.btrfs_finish_ordered_io.normal_work_helper
2.00 ± 18% +1.2 3.23 ± 27% perf-profile.calltrace.cycles-pp.add_pending_csums.btrfs_finish_ordered_io.normal_work_helper.process_one_work.worker_thread
2.00 ± 17% +1.2 3.23 ± 27% perf-profile.calltrace.cycles-pp.btrfs_csum_file_blocks.add_pending_csums.btrfs_finish_ordered_io.normal_work_helper.process_one_work
2.94 ± 23% +1.5 4.45 ± 16% perf-profile.calltrace.cycles-pp.btrfs_duplicate_item.btrfs_mark_extent_written.btrfs_finish_ordered_io.normal_work_helper.process_one_work
7.88 ± 29% -4.8 3.06 ± 54% perf-profile.children.cycles-pp.wb_workfn
7.88 ± 29% -4.8 3.06 ± 54% perf-profile.children.cycles-pp.wb_writeback
7.88 ± 29% -4.8 3.06 ± 54% perf-profile.children.cycles-pp.writeback_sb_inodes
7.88 ± 29% -4.8 3.06 ± 54% perf-profile.children.cycles-pp.__writeback_single_inode
7.91 ± 29% -4.4 3.48 ± 59% perf-profile.children.cycles-pp.do_writepages
5.74 ± 23% -3.0 2.79 ± 60% perf-profile.children.cycles-pp.extent_writepages
5.74 ± 23% -3.0 2.79 ± 60% perf-profile.children.cycles-pp.extent_write_cache_pages
5.47 ± 23% -2.8 2.67 ± 61% perf-profile.children.cycles-pp.__extent_writepage
4.56 ± 22% -2.3 2.23 ± 61% perf-profile.children.cycles-pp.writepage_delalloc
4.22 ± 22% -2.1 2.10 ± 62% perf-profile.children.cycles-pp.btrfs_run_delalloc_range
4.21 ± 22% -2.1 2.10 ± 62% perf-profile.children.cycles-pp.run_delalloc_nocow
2.47 ± 39% -1.6 0.90 ± 64% perf-profile.children.cycles-pp.submit_extent_page
2.17 ± 47% -1.5 0.70 ± 69% perf-profile.children.cycles-pp.btree_write_cache_pages
2.23 ± 40% -1.5 0.78 ± 67% perf-profile.children.cycles-pp.submit_one_bio
2.08 ± 47% -1.4 0.66 ± 69% perf-profile.children.cycles-pp.write_one_eb
2.44 ± 29% -1.3 1.10 ± 18% perf-profile.children.cycles-pp.crc32c
2.43 ± 29% -1.3 1.10 ± 18% perf-profile.children.cycles-pp.chksum_update
2.43 ± 29% -1.3 1.10 ± 18% perf-profile.children.cycles-pp.__crc32c_le
1.69 ± 46% -1.2 0.54 ± 69% perf-profile.children.cycles-pp.btree_submit_bio_hook
1.68 ± 46% -1.1 0.54 ± 69% perf-profile.children.cycles-pp.btree_csum_one_bio
1.67 ± 46% -1.1 0.54 ± 69% perf-profile.children.cycles-pp.csum_tree_block
1.14 ± 21% -0.5 0.65 ± 30% perf-profile.children.cycles-pp.queue_work_on
0.88 ± 25% -0.5 0.42 ± 62% perf-profile.children.cycles-pp.__extent_writepage_io
1.07 ± 17% -0.4 0.62 ± 29% perf-profile.children.cycles-pp.__queue_work
0.76 ± 21% -0.4 0.35 ± 59% perf-profile.children.cycles-pp.create_io_em
0.60 ± 27% -0.4 0.23 ± 51% perf-profile.children.cycles-pp.btrfs_lookup_csums_range
0.60 ± 27% -0.4 0.23 ± 51% perf-profile.children.cycles-pp.csum_exist_in_range
0.65 ± 25% -0.3 0.31 ± 57% perf-profile.children.cycles-pp.btrfs_drop_extent_cache
0.53 ± 23% -0.3 0.23 ± 71% perf-profile.children.cycles-pp.btrfs_submit_bio_hook
0.53 ± 23% -0.3 0.23 ± 72% perf-profile.children.cycles-pp.btrfs_wq_submit_bio
0.55 ± 27% -0.3 0.28 ± 38% perf-profile.children.cycles-pp.btrfs_inode_rsv_release
0.38 ± 31% -0.2 0.13 ± 76% perf-profile.children.cycles-pp.btrfs_cross_ref_exist
0.33 ± 26% -0.2 0.12 ± 70% perf-profile.children.cycles-pp.find_lock_delalloc_range
0.56 ± 26% -0.2 0.36 ± 40% perf-profile.children.cycles-pp.btrfs_remove_ordered_extent
0.26 ± 27% -0.2 0.10 ± 69% perf-profile.children.cycles-pp.find_delalloc_range
0.22 ± 34% -0.1 0.08 ± 81% perf-profile.children.cycles-pp.check_committed_ref
0.38 ± 13% -0.1 0.25 ± 33% perf-profile.children.cycles-pp.btrfs_map_bio
0.21 ± 34% -0.1 0.09 ± 87% perf-profile.children.cycles-pp.__btrfs_add_ordered_extent
0.21 ± 34% -0.1 0.09 ± 87% perf-profile.children.cycles-pp.btrfs_add_ordered_extent
0.22 ± 13% -0.1 0.11 ± 48% perf-profile.children.cycles-pp.btrfs_tree_read_unlock_blocking
0.22 ± 24% -0.1 0.10 ± 25% perf-profile.children.cycles-pp.btrfs_tree_read_lock_atomic
0.17 ± 28% -0.1 0.05 ±100% perf-profile.children.cycles-pp.end_bio_extent_buffer_writepage
0.17 ± 24% -0.1 0.06 ± 65% perf-profile.children.cycles-pp.extent_clear_unlock_delalloc
0.36 ± 15% -0.1 0.25 ± 35% perf-profile.children.cycles-pp.btrfs_submit_bio_done
0.17 ± 32% -0.1 0.06 ± 65% perf-profile.children.cycles-pp.find_get_pages_range_tag
0.17 ± 32% -0.1 0.06 ± 67% perf-profile.children.cycles-pp.pagevec_lookup_range_tag
0.13 ± 46% -0.1 0.03 ±102% perf-profile.children.cycles-pp.memzero_extent_buffer
0.12 ± 42% -0.1 0.03 ±100% perf-profile.children.cycles-pp.clear_page_dirty_for_io
0.13 ± 34% -0.1 0.04 ±110% perf-profile.children.cycles-pp.__test_set_page_writeback
0.16 ± 25% -0.1 0.08 ± 58% perf-profile.children.cycles-pp.xas_find_marked
0.10 ± 36% -0.1 0.03 ±102% perf-profile.children.cycles-pp.btrfs_merge_bio_hook
0.10 ± 34% -0.1 0.03 ±102% perf-profile.children.cycles-pp.btrfs_map_block
0.11 ± 24% -0.1 0.05 ± 62% perf-profile.children.cycles-pp.btrfs_get_chunk_map
0.11 ± 14% -0.0 0.08 ± 23% perf-profile.children.cycles-pp.leave_mm
0.11 ± 4% +0.0 0.14 ± 8% perf-profile.children.cycles-pp.rb_next
0.08 ± 6% +0.0 0.10 ± 10% perf-profile.children.cycles-pp.tick_nohz_idle_enter
0.23 ± 4% +0.0 0.26 ± 5% perf-profile.children.cycles-pp.dequeue_entity
0.07 ± 17% +0.0 0.10 ± 4% perf-profile.children.cycles-pp.rb_erase
0.16 ± 6% +0.0 0.20 ± 10% perf-profile.children.cycles-pp.nr_iowait_cpu
0.14 ± 11% +0.0 0.18 ± 8% perf-profile.children.cycles-pp.__module_text_address
0.00 +0.1 0.05 ± 8% perf-profile.children.cycles-pp.btrfs_set_token_64
0.28 ± 2% +0.1 0.34 ± 7% perf-profile.children.cycles-pp.dequeue_task_fair
0.01 ±173% +0.1 0.08 ± 27% perf-profile.children.cycles-pp.write_extent_buffer
0.23 ± 13% +0.1 0.30 ± 10% perf-profile.children.cycles-pp.__kernel_text_address
0.12 ± 33% +0.1 0.19 ± 21% perf-profile.children.cycles-pp.btrfs_leaf_free_space
0.12 ± 5% +0.1 0.20 ± 33% perf-profile.children.cycles-pp.set_extent_buffer_dirty
0.05 ± 60% +0.1 0.13 ± 8% perf-profile.children.cycles-pp.btrfs_free_tree_block
0.25 ± 16% +0.1 0.35 ± 22% perf-profile.children.cycles-pp.btrfs_free_path
0.15 ± 12% +0.1 0.24 ± 25% perf-profile.children.cycles-pp.alloc_extent_buffer
0.20 ± 11% +0.1 0.31 ± 21% perf-profile.children.cycles-pp.memcpy_extent_buffer
0.28 ± 18% +0.1 0.39 ± 15% perf-profile.children.cycles-pp.btrfs_unlock_up_safe
0.10 ± 10% +0.1 0.25 ± 10% perf-profile.children.cycles-pp.btrfs_add_delayed_tree_ref
0.15 ± 28% +0.2 0.31 ± 27% perf-profile.children.cycles-pp.btrfs_add_delayed_data_ref
0.15 ± 30% +0.2 0.31 ± 28% perf-profile.children.cycles-pp.btrfs_inc_extent_ref
0.23 ± 19% +0.2 0.41 ± 25% perf-profile.children.cycles-pp.unpin_extent_cache
0.31 ± 14% +0.2 0.50 ± 23% perf-profile.children.cycles-pp.memmove
0.14 ± 15% +0.2 0.33 ± 15% perf-profile.children.cycles-pp.add_delayed_ref_head
0.94 ± 14% +0.2 1.13 ± 4% perf-profile.children.cycles-pp.schedule
0.26 ± 30% +0.2 0.45 ± 21% perf-profile.children.cycles-pp.__push_leaf_right
0.28 ± 7% +0.2 0.49 ± 22% perf-profile.children.cycles-pp.copy_page
0.27 ± 10% +0.2 0.49 ± 23% perf-profile.children.cycles-pp.copy_extent_buffer_full
0.38 ± 15% +0.2 0.60 ± 17% perf-profile.children.cycles-pp.btrfs_alloc_tree_block
0.54 ± 26% +0.3 0.80 ± 19% perf-profile.children.cycles-pp.btrfs_set_token_32
0.00 +0.5 0.53 ± 56% perf-profile.children.cycles-pp.space_info_add_old_bytes
0.91 ± 15% +0.6 1.50 ± 24% perf-profile.children.cycles-pp.push_leaf_right
1.09 ± 17% +0.6 1.74 ± 25% perf-profile.children.cycles-pp.split_leaf
0.83 ± 10% +0.6 1.48 ± 20% perf-profile.children.cycles-pp.__btrfs_cow_block
0.84 ± 11% +0.7 1.49 ± 19% perf-profile.children.cycles-pp.btrfs_cow_block
1.44 ± 19% +0.9 2.32 ± 26% perf-profile.children.cycles-pp.btrfs_insert_empty_items
1.60 ± 20% +0.9 2.51 ± 22% perf-profile.children.cycles-pp.setup_items_for_insert
2.00 ± 18% +1.2 3.23 ± 27% perf-profile.children.cycles-pp.add_pending_csums
2.00 ± 17% +1.2 3.23 ± 27% perf-profile.children.cycles-pp.btrfs_csum_file_blocks
2.94 ± 23% +1.5 4.45 ± 16% perf-profile.children.cycles-pp.btrfs_duplicate_item
2.37 ± 27% -1.3 1.08 ± 18% perf-profile.self.cycles-pp.__crc32c_le
0.13 ± 46% -0.1 0.03 ±102% perf-profile.self.cycles-pp.memzero_extent_buffer
0.16 ± 25% -0.1 0.08 ± 58% perf-profile.self.cycles-pp.xas_find_marked
0.11 ± 3% +0.0 0.13 ± 3% perf-profile.self.cycles-pp.rb_next
0.06 ± 15% +0.0 0.08 ± 10% perf-profile.self.cycles-pp.dequeue_task_fair
0.07 ± 17% +0.0 0.10 ± 4% perf-profile.self.cycles-pp.rb_erase
0.06 ± 17% +0.0 0.10 ± 30% perf-profile.self.cycles-pp.block_group_cache_tree_search
0.16 ± 6% +0.0 0.19 ± 11% perf-profile.self.cycles-pp.nr_iowait_cpu
0.12 ± 6% +0.0 0.16 ± 11% perf-profile.self.cycles-pp.__switch_to
0.13 ± 14% +0.0 0.17 ± 7% perf-profile.self.cycles-pp.pick_next_task_fair
0.01 ±173% +0.1 0.08 ± 27% perf-profile.self.cycles-pp.write_extent_buffer
0.22 ± 25% +0.1 0.32 ± 13% perf-profile.self.cycles-pp.setup_items_for_insert
0.11 ± 13% +0.2 0.27 ± 15% perf-profile.self.cycles-pp.add_delayed_ref_head
0.31 ± 13% +0.2 0.49 ± 23% perf-profile.self.cycles-pp.memmove
0.27 ± 6% +0.2 0.49 ± 22% perf-profile.self.cycles-pp.copy_page
0.48 ± 24% +0.3 0.74 ± 19% perf-profile.self.cycles-pp.btrfs_set_token_32
fio.write_clat_95__us
600 +-+-------------------------------------------------------------------+
| O O |
550 +-+ O O |
| O |
500 +O+ O O O OOOO O O O O O O O OOO |
O O O OO O O O O O |
450 +-+ O O O O |
| |
400 +-+ |
| |
350 +-+ |
| + +. .+ + +. .+++ +. .++ .++++.++ +.++|
300 +-+++ +.++++.+++ ++++ + +.+++ ++++ +.+++ ++++ ++ + |
| |
250 +-+-------------------------------------------------------------------+
fio.write_clat_99__us
1400 +-+------------------------------------------------------------------+
1300 +-+ O O |
| O O O OO O O |
1200 +-+ O O O O O O O |
1100 OOO O O O O O O O OO O O O |
| O O O |
1000 +-+ O O O |
900 +-+ |
800 +-+ |
| |
700 +-+ |
600 +-+ |
| .+ |
500 +-+. + .+ + .+ .++ +. + .+ +.+ + + +. +++.++++ +++.++|
400 +-+------------------------------------------------------------------+
fio.latency_50us_
40 +-+--------------------------------------------------------------------+
| |
35 +O+ OO O O O OO O O O |
30 O-+OOO O OO OO O O O O O O OO O |
| O O O O O O |
25 +-+ O O |
| |
20 +-+ |
| |
15 +-+ |
10 +-+ |
| |
5 +-+ |
| |
0 +-+--------------------------------------------------------------------+
fio.latency_100us_
30 +-+--------------------------------------------------------------------+
| O O |
25 +-+ O O O O O O O OO |
O O O O O OO O OO |
|O OOO OO OO O OOO OO O |
20 +-+ O |
| |
15 +-+ |
| |
10 +-+ |
| |
| |
5 +-+ |
|+.++++.++++.++++.+++.++++.++++.+++.++++.++++.++++.+++.++++.++++.++++.+|
0 +-+--------------------------------------------------------------------+
fio.latency_250us_
80 +-+--------------------------------------------------------------------+
|+.+ ++.++ +.++ +.+++ +++.+++ +++.+ ++.++++ +++.+ +.+ ++.++++.++++.+|
70 +-+ |
| |
| |
60 +-+ |
| |
50 +-+ |
| |
40 +-+ |
| |
| |
30 +-+ O O O O O O O |
OO OO O OOO O OOO O O O O OO O OOO O |
20 +-+------------OO-----------------O--OOO-O-----------------------------+
fio.latency_750us_
4 +-+-------------------------------------------------------------------+
| O O |
3.5 +-+ |
3 +-+ O O O |
|O O OOOO O O O OO O O O O |
2.5 O-+O OO OO O O O |
| OO OO O OO O |
2 +-+ |
| |
1.5 +-+ |
1 +-+ |
| |
0.5 +-+ |
|+.++++.++ +.++++.++++.++++.++++.++++.++++.++++.++++.++++.++++.++++.++|
0 +-+-------------------------------------------------------------------+
fio.latency_1000us_
1.4 +-+-------------------------------------------------------------------+
| O O |
1.2 +-+ |
| O O |
1 +O+ O O O OO O O O O |
O O O O OO O O O O O O O |
0.8 +-+ O O O O O O |
| O O O O |
0.6 +-+ |
| |
0.4 +-+ |
| |
0.2 +-++ +. + .+ + ++. + .+ + ++. + .+ + ++ .++++.++++.++|
|+ +++.+++ + ++ + +.++ + ++ + +.++ + ++ + +.+ + |
0 +-+-------------------------------------------------------------------+
fio.latency_4ms_
0.35 +-+------------------------------------------------------------------+
| |
0.3 +-+ O O O |
| OO O OOO O O O O O OO |
0.25 +-O O OO O OO |
OO O O O O O |
0.2 +-+ O O O O |
| O O O |
0.15 +-+ |
| |
0.1 +-+ |
| |
0.05 +-+ |
|++.++++.++++.+++++.++++.++++.++++.+++++.++++.++++.+++++.++++.++++.++|
0 +-+------------------------------------------------------------------+
fio.latency_10ms_
0.14 +-+------------------------------------------------------------------+
| |
0.12 +-+ O O O O |
| O O OO O O |
0.1 +-+ O O |
O O O O O O O OOOO O O O |
0.08 +O+ O O O O O O O |
| O O O |
0.06 +-+ |
| |
0.04 +-+ |
| + |
0.02 +-+ +.+ ++. +++.++ +.++++.++|
|++.++++.++++.+++++.+++ +++.++++.+++ ++++.++++.++ |
0 +-+------------------------------------------------------------------+
fio.latency_20ms_
0.03 +-+------O----------------------------------------------------------+
0.028 +-+ |
| O O O O |
0.026 +-+ O |
0.024 +-O O O |
| O O O |
0.022 O-+ O O O |
0.02 +-+ O O O OO OO |
0.018 +-+ O O O O OO O |
|O O |
0.016 +-+ O O O O O |
0.014 +-+ |
| |
0.012 +-+ + |
0.01 +-+-----------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Rong Chen
View attachment "config-4.20.0-rc3-00082-g4fd93529" of type "text/plain" (168529 bytes)
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